Interchangeable set of relays for telephone purposes



F. MERK 1,714,611

INTERCHANGEABLE SET OF RELAYS FOR TELEPHONE PURPOSES Filed Sept. 20,1927 immmmWA Fig. 7

May 28,-, 1929.

cccccFitcccccL i i W I W n 6 v n 7 Patented May 28, 1929.

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NT "OFFICE.

FRIEDRICH MERE, IVIUNICH,GER1VIANY.

Application filed September 20, 1927. Serial No. 220,725.

This invention relates to sets of relays in which the relays are mountedin a row on a bar, facility of interchanging the several sets of relaysin using eontact-connectmg- 5 bars for automatically producing ordisconnecting the electric-connections being required. to thearrangement and construction of the contact-connection-bars. The barsmust be simple, occupy little space, admit of a great number ofcontact-points and further ensure, in avoiding one sided pressure-actionupon the set of relays, a good contact-pressure and securecontact-engagement. All

soldering and contact points must be visible and accessible in theservice.

According to the invention these conditions are fulfilled by arrangingthe connecting bar, consisting as usual of an apparatusbar and of aframe-bar, on the rear of the set of relays, extending in thelongitudinal direction of the same and carried out preferably in adouble-row.

An embodiment of the invention is illustrated, by way of example, in theaccompanying drawing in which:

Fig. 1 shows the improved relay-bar in elevation.

Fig. 2 shows in side elevation the relaybar, fixed on the frame.

Fig. 3 shows in side-elevation, partly In section, acontact spring.

Fig. 4 shows in sidev elevation, partly in section, the pin of the frameon which the 5 second bar is mounted.

Referring to Figs. 1 and 2, T is the relaybar and R designates a numberof relays fixed on said bar. The relays are arranged so that theircontact-springs are situated on one side, the solder-connections of thecontact-springs as well as of the relaycoils projecting at both sides ofthe bar T in rearward direction. The relays with the bar T form the setof relays proper.

A second bar S is fixed, according to the invention, to the bar T at acertain distance from the same and carries an apparatus-bar K on whichinsulated contact-pins (L1, a are mounted. The contact springsareconstructed as shown in Fig. 3, as pieces of sheet-metal, bent at rightangles and arranged in two rows. Each contact pin is arranged at therear-end for contact-formation and at the other laterally projecting end(see Fig. 1) for solder-connection with The invention relatesparticularly contact-connection.

the relay and with any other apparatus i which might be fixed on thebar'T, for instance condensers C; With regard to the wire-connections,necessary for these purposes, the interval is provided between theapparatus fixed on the bar T or on the bar S.

The frame-bar K consists of a set of contact-springs f, arranged also ina double row. The springs are insulated and held on a bar by means ofcover-plates and screws.

son the springs are further bent at the free end in inclined direction.The frame-bar with the springs and with the rod G is fixed as a whole byscrews on the carrying frame of the set of relays.

The set of relays is fixed on the carrying frame by suspension on a rodD by means of a suspension bow H, adjustable rings 1*, 1' are fixed onthe rod D, in order to accurately fix the suspending point. The set ofrelays is moved towards the rod D in inclined position, thesuspension-bow H is then hooked over the rod andthe set of relayspressed towards the frameQ The contact pins of the set of relays engagebetween the contact-springs like knives and establish the curateengagement of the contactpins with the contact-springs at the pressingon of the set of relays, the'following special arrangement is made:

On the carrying frame pin F is fixed I and the bar S has a correspondinghole with which pin F must engage before the contact pins touch thecontact-springs. A stop A on pin F limits the movement of the set ofrelays at the pressing on. A blade-spring B gripping around the bar Sholds the set of relays, pushing upand dropping out of the set of relaysbeing prevented by the pin F.

I claim f y 1. An interchangeable set of relays for telephone purposes,comprising in combination with a carrying frame, a bar on which therelays are fixed, a contact bar spaced from and fixed to said relay bar,contact For obtaining an ac-:

pins fixed on said contact bar a frame bar, contact bar and of thecontact bar and of and contact springs on said frame bar with thecontact springs of the framebar in two 10 which said contact pins comeinto touch rows so that the insertion of the set of when said relay barwith the relays is being relays the two rows of contact pins of the 5suspended on the carrying frame. contact bar spread the two rows ofcontact 2. In an interchangeable set of relays for springs of the framebar. telephone purposes as specified. in claim 1 In testimony whereof Iaffix my signature. the arrangement of the contact pins of the FRIEDRICHMERE;

